42CrMo Pneumatic Piston Rod , Hard Chrome Plated Precision Ground Shaft

42CrMo Pneumatic Piston Rod,  Hard Chrome Plated  Precision   Ground Shaft

 
Detailed Product Description
 

1. Material: CK45, ST52, 20MnV6, 42CrMo4, 40Cr

2. Ground and chrome plated

3. ISO9001:2008

4. Advanced inspection apparatus

5. Complete manufactured equipment

Detailed Description

1.CHEMICAL COMPOSITION

2.MECHANCIAL PROPERTIES

3. SUPPLY CONDITION
    Ground  and  chrome plated 
4. CHROME THICKNESS
     20 to 30 micron
5. SURFACE ROUGHNESS
     Ra≤0.2 micron and  Rt≤2 micro
6. TOLERANCES ON DIA
    ISO f7 on the diameter
7.OVALITY
Half of the tolerance ISO f7
8. STRAIGHTNESS
   ≤0.2MM/M
9. SURFACE HARDNESS
   850-1150HV (vickers 100g)
10.COHESION
   No cracks,breaking or detaching after thermic shock(warming up at 300 celsius degrees and cooling 
   in water)
11 .POROSITY
     Test according to ISO 1456/1458 and result yaluation according to ISO 4540 rating 8-10
12 CORROSION RESISTANCE
     Test in natural salt spray according to ASTM B 117-72hours
     Results evaluation according to ISO 4540 RATING 7-10
13. WELDABILITY
      Good
14. PACKING
     Anti rust oil to be applied on material and each rod to be packed in paper sleeve
15. CERTIFICATE
     All certificate related with material heat treatment and plating is required

We imported one continous chrome plating line from Italy at the beginning of 2016. With this new chrome plating line, we will improve efficiency and product quality a lot.The new chrome plating line is the first one in China and will be the only one in the next five years!